Embedded methane and odor diffusion preventing device for drainage inspection well

Abstract

The invention relates to an embedded methane and odor emission prevention device for a drainage inspection well. The embedded methane and odor emission prevention device is composed of a composite breathable film, a cylindrical shell, a biological filler layer, a porous bottom plate, a fixing ring, a water seal box and a downpipe. The upper portion of the cylindrical shell is open, and a layer of composite breathable film is laid on the upper portion of the cylindrical shell. The embedded methane and odor emission prevention device for the drainage inspection well can be installed in an existing street drainage inspection well or a residential district septic tank inspection well, methane and odor in an underground drainage pipeline and a septic tank can be effectively prevented from being emitted into the ground air environment, and the air environment quality in urban streets and residential districts is improved; methane in the drainage pipe system is prevented from being released into the atmospheric environment to generate a greenhouse gas effect. Viruses in a drainage system can be effectively prevented from diffusing into the ground air environment along with aerosol, and the method has important significance on guaranteeing public safety.

Description

Technical Field

[0001] This invention relates to an embedded device for preventing the emission of methane and odor from drainage inspection wells, specifically belonging to the field of environmental protection. It can improve the air quality of urban streets and prevent viruses from spreading from sewer drainage systems and septic tank systems into the ground air, as well as prevent methane carbon sources from being emitted from drainage pipe systems into the atmosphere, thus preventing the greenhouse gas effect. Background Technology

[0002] Currently, urban drainage pipes are basically laid along streets and roads, forming a vast system that requires drainage inspection wells at regular intervals. Under anaerobic or anoxic conditions, sewage and sediment in underground drainage pipes release methane and foul odors, overflowing from inspection wells and septic tank openings into the air, affecting pedestrians and residents. Methane release from drainage systems is an easily overlooked, hidden source of carbon emissions; statistics show it accounts for approximately half of the carbon emissions from wastewater treatment plants, a significant amount. Furthermore, sewage flowing through drop manholes and other drainage systems causes water disturbance, easily generating aerosols. Viruses in the sewage can be carried by these aerosols, overflowing from inspection wells and spreading into the atmosphere, posing a significant threat to public safety.

[0003] Urban sewage systems are vast, with underground drainage pipes crisscrossing streets and alleys. In some older streets, the underground drainage pipes and manholes accumulate sediment, resulting in more severe odors, especially during hot summers and rainy days. This odor concentration is high, causing olfactory irritation to pedestrians and seriously impacting urban air quality. Therefore, embedding a device to prevent the emission of methane, odors, and viruses into existing drainage manholes or septic tank manholes can reduce carbon emissions, improve street air quality, and enhance public safety. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an embedded device for preventing the emission of methane and odors from drainage inspection wells. This device prevents odors from drainage pipes from escaping from the sewage inspection wells into the street air, thus protecting the health of pedestrians and improving urban air hygiene. It also prevents the emission of methane carbon sources from the drainage system into the atmosphere, contributing to the greenhouse gas effect. Furthermore, this invention prevents infectious viruses from the drainage system from spreading from the sewage inspection wells into the atmosphere, enhancing public health and safety. This device is embedded within the drainage inspection well, without affecting the existing structure of drainage inspection wells and septic tank covers, eliminating the need to replace existing covers, minimizing traffic disruption, and allowing for quick and convenient installation.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: an embedded device for preventing the emission of methane and odor from a drainage inspection well, comprising a composite breathable membrane, a cylindrical shell, a biological filler layer, a porous base plate, a fixing ring, a water seal box, and a downpipe; the upper part of the cylindrical shell is open and covered with a layer of composite breathable membrane, the lower part of the cylindrical shell is a porous base plate, on which a biological filler layer is laid, the cylindrical shell is placed on an annular fixing ring, the annular fixing ring is fixed to the well wall, and a water seal box and a downpipe are set in the middle of the cylindrical shell.

[0006] As a further embodiment of the present invention: the device is installed on the well wall below the cover of an existing street drainage inspection well, rainwater inspection well, or community septic tank inspection well.

[0007] As a further aspect of the present invention: the inspection well is an existing brick-concrete structure, reinforced concrete structure, or prefabricated plastic inspection well.

[0008] As a further aspect of the present invention: the cylindrical shell is placed on a fixing ring, which is pre-fixed to the well wall.

[0009] As a further aspect of the present invention: the composite breathable membrane is a multi-microporous hydrophobic breathable membrane that only allows small molecular weight gases such as water vapor and air to pass through, while blocking large odor molecules such as hydrogen sulfide, ammonia, and methanethiol, as well as viruses, from passing through; the odor components intercepted by the composite breathable membrane dissolve in water droplets below the membrane, drip into the biological packing layer, and are decomposed by deodorizing microorganisms in the biological packing layer.

[0010] As a further aspect of the present invention: the composite breathable membrane is made of PTFE; to increase the strength of the composite breathable membrane, a hydrophobic breathable membrane can be combined with a mesh structure material such as non-woven fabric.

[0011] As a further aspect of the present invention: the cylindrical shell has a perforated bottom plate, and the upper opening can also be covered with a perforated cover plate; the shape of the cylindrical shell can be circular, square, rectangular, etc., depending on the shape of the drainage inspection well; the holes on the perforated bottom plate can be circular, rhomboid, etc.; the cylindrical shell can be made of plastic or steel, etc.

[0012] As a further aspect of the present invention: a biological packing layer is laid inside the cylindrical shell and on the porous bottom plate, on which deodorizing microorganisms are attached and multiplied, and the odor components are decomposed by the microorganisms.

[0013] As a further aspect of the present invention: the material of the biological filler layer can be organic or inorganic, and its form can be granular, fiber bundle, or fiber cluster. It can be sand, volcanic rock, bamboo charcoal, activated carbon, porous plastic rings, biomass filler, etc. The filler in the biological filler layer can be one or more of the above fillers combined. Biological deodorizing bacteria are sprayed on the biological filler layer. The deodorizing bacteria use methane, odor components, and dripping rainwater as nutrients to reproduce, thereby continuously ensuring the deodorizing effect.

[0014] As a further aspect of the present invention: a water seal box and a downpipe are provided inside the cylindrical shell. Rainwater flowing into the well from the ground flows into the water seal box through the downpipe and is stored and evaporated in the water seal box to provide moisture for the reproduction of microorganisms in the biological packing layer; there may be one or more water seal boxes and downpipes.

[0015] Compared with existing technologies, this invention has the following advantages: This device can be installed in existing urban street drainage inspection wells and residential septic tank inspection wells, effectively preventing methane and odors from spreading from underground drainage pipes into the atmosphere, thus affecting urban street air quality and reducing carbon emissions. It can also effectively prevent viruses from spreading to the ground air environment via aerosols from underground drainage pipes and residential septic tanks, which is of great significance for ensuring public safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] In the diagram: 1. Composite breathable membrane; 2. Cylindrical shell; 3. Cylindrical shell; 4. Porous base plate; 5. Fixing ring; 6. Water seal box; 7. Downpipe. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0019] Please see Figure 1 The present invention provides the following technical solutions: Example 1

[0020] like Figure 1As shown, this invention proposes an embedded device for preventing the emission of methane and odor from a drainage inspection well. The device comprises a composite breathable membrane 1, a cylindrical shell 2, a biological filler layer 3, a porous base plate 4, a fixing ring 5, a water seal box 6, and a downpipe 7. The device is installed inside the well wall below the well cover. The upper part of the cylindrical shell 2 is open and covered with a layer of composite breathable membrane 1. The lower part of the cylindrical shell 2 is a porous base plate 4, on which the biological filler layer 3 is laid. The cylindrical shell 2 is placed on an annular fixing ring 5, which is fixed to the well wall. A water seal box 6 and a downpipe 7 are located in the middle of the cylindrical shell 2.

[0021] When methane and odorous components from underground drainage pipes or septic tanks diffuse through inspection wells, they first pass through the biological packing layer 3 within the deodorization device, where they are mostly decomposed into water and carbon dioxide by the deodorizing microorganisms on the biological packing layer 3. Undecomposed large-molecule odorous components and viruses are blocked by the upper composite breathable membrane 1 and dissolved in water droplets below the membrane, which then drip into the biological packing layer 3, where they are further decomposed by the deodorizing microorganisms. Rainwater flowing into the well flows through the downpipe 7 into the water seal box 6, where it is stored and evaporated, providing moisture for the microorganisms in the biological packing layer 3. The dripping rainwater, containing organic matter, also provides nutrients for the deodorizing microorganisms. To ensure deodorization effectiveness, deodorizing microbial inoculants can be sprayed onto the biological packing layer 3 beforehand. Example 2

[0022] In another embodiment, the cylindrical shell 2 is circular, suitable for circular inspection wells. The porous base plate 4 has circular holes, the biological filler layer 3 uses volcanic rock particles, and the composite breathable membrane 1 is made of PTFE material combined with non-woven fabric to increase strength. One water seal box 6 and one downpipe 7 are each provided. The fixing ring 5 is fixed to the well wall with expansion bolts to ensure the stability of the device. This embodiment is suitable for street drainage inspection wells and can effectively block odors such as methane and hydrogen sulfide after installation. Example 3

[0023] In another embodiment, the cylindrical shell 2 is rectangular in shape, suitable for square inspection wells. The porous bottom plate 4 has rhomboid holes, the biological packing layer 3 uses a mixture of bamboo charcoal, activated carbon, and biomass packing, and the composite breathable membrane 1 is a pure PTFE membrane. Two water seal boxes 6 and two downpipes 7 are provided to increase the water seal effect and rainwater collection capacity. This embodiment is suitable for inspection wells in septic tanks in residential areas, and can efficiently decompose odorous components such as ammonia and methanethiol, while preventing the spread of viruses. Example 4

[0024] In another embodiment, the biological packing layer 3 uses a composite packing of porous plastic rings and sand, pre-sprayed with deodorizing microbial inoculants. The cylindrical shell 2 is made of stainless steel, and the porous bottom plate 4 is made of perforated steel plate. The composite breathable membrane 1 adopts a multi-layer PTFE composite structure to enhance durability. The water seal box 6 has a built-in float valve to automatically control the water level and ensure the moisture supply for the microorganisms. This embodiment is suitable for high-load drainage inspection wells and operates stably over a long period of time.

[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for preventing the emission of methane and odor from a drainage inspection well, characterized in that: It consists of a composite breathable membrane (1), a cylindrical shell (2), a biological filler layer (3), a porous bottom plate (4), a fixing ring (5), a water seal box (6), and a downpipe (7); the cylindrical shell (2) has an opening at the top and is covered with a layer of composite breathable membrane (1), the bottom of the cylindrical shell (2) is a porous bottom plate (4), a biological filler layer (3) is laid on the porous bottom plate (4), the cylindrical shell (2) is placed on the annular fixing ring (5), the annular fixing ring (5) is fixed to the well wall, and a water seal box (6) and a downpipe (7) are set in the middle of the cylindrical shell (2).

2. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The device is installed on the wall below the cover of an existing street drainage inspection well, rainwater inspection well, or community septic tank inspection well.

3. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The inspection well is an existing brick-concrete structure, reinforced concrete structure, or prefabricated plastic inspection well.

4. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The cylindrical shell (2) is placed on the fixing ring (5), which is fixed to the well wall beforehand.

5. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The composite breathable membrane (1) is a multi-microporous hydrophobic breathable membrane.

6. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The composite breathable membrane (1) is made of PTFE material or a composite weaving of hydrophobic breathable membrane and non-woven mesh structure material.

7. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The cylindrical shell (2) has a perforated bottom plate (4), and the cylindrical shell (2) is circular, square or rectangular in shape; the holes on the perforated bottom plate (4) are circular or rhomboid in shape; the cylindrical shell (2) is made of plastic or steel.

8. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: A biological filler layer (3) is laid inside the cylindrical shell (2) and on the porous bottom plate (4). Deodorizing microorganisms are attached to and reproduce on the biological filler layer (3), and the odor components are decomposed by the microorganisms.

9. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: The biological filler layer (3) is made of organic or inorganic materials. The biological filler layer (3) is composed of one or more of sand, volcanic rock, bamboo charcoal, activated carbon, porous plastic rings, and biomass fillers. Biological deodorizing bacteria are sprayed inside the biological filler layer (3). The biological filler layer (3) is formed by bulk stacking or mechanical molding into a porous cake shape. The cake-shaped biological filler layer (3) is one or more pieces.

10. The device for preventing the emission of methane and odor from a drainage inspection well as described in claim 1, characterized in that: A water seal box (6) and a downpipe (7) are installed inside the cylindrical shell (2). Rainwater flowing into the well from the ground flows into the water seal box (6) through the downpipe (7) and is stored and evaporated in the water seal box (6) to provide moisture for the reproduction of microorganisms in the biological packing layer (3). There are one or more water seal boxes (6) and downpipes (7). Water, nutrient solution or deodorizing bacteria are added through the downpipe (7).

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